| Height (cm) | ca. 35–45 | No data | 30–50 |
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| Rhizome | Short | Creeping, 3–6 cm below surface of ground | Short creeping, 0.3 mm thick, 1.5–5 cm below the surface of ground |
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| Rhizome hairs | Present | Present, coarse shiny brown, 2–3 mm long | Present, shiny brown, appressed, 1–2 mm long, covering entire rhizome |
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| Sterile frond |
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| Length of stipes (cm) | ca. 15–20 | No data | 18.5–26.6 |
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| Wing of stipes | Not winged | No data | Slightly winged at the middle to distinctly winged at the apex |
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| Size of lamina (cm) | ca. 15 × 17 | No data | 9–15 × 2–4 |
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| Branching of lamina | Dichotomously 6–8 times | No data | Dichotomously 4–5 times |
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| Fertile frond |
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| Length of stipes (cm) | Up to 20 | 15–30 (extremes 10–50) | 11–27 |
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| Winged stipe | Narrowly present | Narrowly winged towards apex | Distinctly winged towards apex with two grooves |
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| Lamina orientation | Not erect | No data | Erect |
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| Size of lamina | Up to 35 cm long | 10–20 cm long & wide | 8–14 cm long & 2–4.5 cm wide |
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| Branching of lamina | Dichotomously 6–8 times | Dichotomously 2–8 times | Dichotomously 3–5 times |
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| Basal branches | No data | Like stipe | Slightly flattened, 1–1.5 mm wide |
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| Distal branches | No data | Wings gradually wider, 1.5 mm wide, lacking prominent costa on lower surface | Flattened, up to 0.5 mm wide, costa slightly prominent |
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| Sorophore |
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| Length of sorophores | No data | Occupying the distal 3–5 mm of each branch of frond | Occupying the distal 5–12 mm long of each branch of frond |
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| No. of sorophores | Up to 34 per stipe | No data | 24–39 per stipe |
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| Lobes of Sorophore |
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| No. of lobe pairs | 7 | 5–10 | 12–16 |
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| Arrangement of lobes | Pinnate, alternate | No data | Opposite |
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| Sporangia |
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| Stalk | No data | No data | Short stout stalk |
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| Shape and color | Reniform | No data | Oblong, brown |
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| Annulus position | No data | No data | Apical annulus |
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| Arrangement | No data | No data | Opposite to alternate, loosely arranged at the base and tightly packed in upper parts |
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| Hairs | No data | Long, brown hairs | Conspicuous long-white hairs |
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